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Sorry. Posted this on the wrong page!

Balenza You will of course have a bypass on the CH circuit in the form of a lockshielded radiator in the room where the room stat is located. I was talking about the HW circuit. W Plan not quicker than S Plan? Are you sure you know what a W Plan is?

Just because twgas and I posted the same conclusion within 7 mins does not mean that we are the same person nor even long-lost twins. We are merely inherently and irrevocably right and superior etc ramble. Atag and Viessmann boilers do internal W-Plans. It's the only way. Gleaming.

Install it on a W-Plan and forget bypasses and throttles. 28mm from the boiler if you so wish. The recovery time on the cylinder will be quicker than any S-Plan.

Does anyone know where I can find atag fault codes. A customer has e0 69 flashing up. There has been a freakish storm where he lives and the boiler is in a shed. Could it be anything to do with the boiler getting wet? Many thanks.

Thank you All Is it true that Atag do training in Holland? By the way, is that Micky P formerly of Dulwich patch? Lurcher

Hi Gang Have installed several viessmann 100s and one 200 with weather comp and cylinder sensor. The latter was very tasty indeed. Am now quoting for a job requiring a 35kw 300. However have just heard about the Atag q series with similar features, better fluing options but no expansion...

Gasguru, I was wondering last night if the diverter had stuck as I lay on the brink of sleep. As I said I put this one in earlier this year when it was failing to move over for hot water. Classic problem on this boiler and for this valve in my experience. The valve I used was one from BES. They...

I changed the 3 port on this boiler earlier this year. Called back to change aav. hw working but ch very poor. Pump is good. ch going on for first time this year. Ravenheat reckon on system blockage/muck. Pump goes like a good 'un but it fires for about 10 seconds and then pump overruns for...